Satisfy flake8 in filesystemtests.py
Satisfy flake8 in filesystemtests.py

jml/flocker,AndyHuu/flocker,hackday-profilers/flocker,mbrukman/flocker,agonzalezro/flocker,runcom/flocker,mbrukman/flocker,achanda/flocker,1d4Nf6/flocker,1d4Nf6/flocker,wallnerryan/flocker-profiles,LaynePeng/flocker,LaynePeng/flocker,moypray/flocker,hackday-profilers/flocker,runcom/flocker,w4ngyi/flocker,agonzalezro/flocker,AndyHuu/flocker,lukemarsden/flocker,runcom/flocker,AndyHuu/flocker,moypray/flocker,beni55/flocker,agonzalezro/flocker,LaynePeng/flocker,lukemarsden/flocker,beni55/flocker,w4ngyi/flocker,lukemarsden/flocker,1d4Nf6/flocker,adamtheturtle/flocker,wallnerryan/flocker-profiles,w4ngyi/flocker,moypray/flocker,beni55/flocker,adamtheturtle/flocker,Azulinho/flocker,achanda/flocker,wallnerryan/flocker-profiles,achanda/flocker,Azulinho/flocker,adamtheturtle/flocker,jml/flocker,Azulinho/flocker,jml/flocker,mbrukman/flocker,hackday-profilers/flocker